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+/*
+* File: ChromeOxide.cpp
+*
+* Version: 1.0
+*
+* Created: 1/11/20
+*
+* Copyright: Copyright © 2020 Airwindows, All Rights Reserved
+*
+* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
+* consideration of your agreement to the following terms, and your use, installation, modification
+* or redistribution of this Apple software constitutes acceptance of these terms. If you do
+* not agree with these terms, please do not use, install, modify or redistribute this Apple
+* software.
+*
+* In consideration of your agreement to abide by the following terms, and subject to these terms,
+* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this
+* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the
+* Apple Software, with or without modifications, in source and/or binary forms; provided that if you
+* redistribute the Apple Software in its entirety and without modifications, you must retain this
+* notice and the following text and disclaimers in all such redistributions of the Apple Software.
+* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to
+* endorse or promote products derived from the Apple Software without specific prior written
+* permission from Apple. Except as expressly stated in this notice, no other rights or
+* licenses, express or implied, are granted by Apple herein, including but not limited to any
+* patent rights that may be infringed by your derivative works or by other works in which the
+* Apple Software may be incorporated.
+*
+* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
+* IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
+* AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
+* OR IN COMBINATION WITH YOUR PRODUCTS.
+*
+* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
+* REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
+* UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
+* IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*/
+/*=============================================================================
+ ChromeOxide.cpp
+
+=============================================================================*/
+#include "ChromeOxide.h"
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+COMPONENT_ENTRY(ChromeOxide)
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// ChromeOxide::ChromeOxide
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ChromeOxide::ChromeOxide(AudioUnit component)
+ : AUEffectBase(component)
+{
+ CreateElements();
+ Globals()->UseIndexedParameters(kNumberOfParameters);
+ SetParameter(kParam_One, kDefaultValue_ParamOne );
+ SetParameter(kParam_Two, kDefaultValue_ParamTwo );
+
+#if AU_DEBUG_DISPATCHER
+ mDebugDispatcher = new AUDebugDispatcher (this);
+#endif
+
+}
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// ChromeOxide::GetParameterValueStrings
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult ChromeOxide::GetParameterValueStrings(AudioUnitScope inScope,
+ AudioUnitParameterID inParameterID,
+ CFArrayRef * outStrings)
+{
+
+ return kAudioUnitErr_InvalidProperty;
+}
+
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// ChromeOxide::GetParameterInfo
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult ChromeOxide::GetParameterInfo(AudioUnitScope inScope,
+ AudioUnitParameterID inParameterID,
+ AudioUnitParameterInfo &outParameterInfo )
+{
+ ComponentResult result = noErr;
+
+ outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
+ | kAudioUnitParameterFlag_IsReadable;
+
+ if (inScope == kAudioUnitScope_Global) {
+ switch(inParameterID)
+ {
+ case kParam_One:
+ AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
+ outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
+ outParameterInfo.minValue = 0.0;
+ outParameterInfo.maxValue = 1.0;
+ outParameterInfo.defaultValue = kDefaultValue_ParamOne;
+ break;
+ case kParam_Two:
+ AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
+ outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
+ outParameterInfo.minValue = 0.0;
+ outParameterInfo.maxValue = 1.0;
+ outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
+ break;
+ default:
+ result = kAudioUnitErr_InvalidParameter;
+ break;
+ }
+ } else {
+ result = kAudioUnitErr_InvalidParameter;
+ }
+
+
+
+ return result;
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// ChromeOxide::GetPropertyInfo
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult ChromeOxide::GetPropertyInfo (AudioUnitPropertyID inID,
+ AudioUnitScope inScope,
+ AudioUnitElement inElement,
+ UInt32 & outDataSize,
+ Boolean & outWritable)
+{
+ return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// ChromeOxide::GetProperty
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult ChromeOxide::GetProperty( AudioUnitPropertyID inID,
+ AudioUnitScope inScope,
+ AudioUnitElement inElement,
+ void * outData )
+{
+ return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
+}
+
+// ChromeOxide::Initialize
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult ChromeOxide::Initialize()
+{
+ ComponentResult result = AUEffectBase::Initialize();
+ if (result == noErr)
+ Reset(kAudioUnitScope_Global, 0);
+ return result;
+}
+
+#pragma mark ____ChromeOxideEffectKernel
+
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// ChromeOxide::ChromeOxideKernel::Reset()
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+void ChromeOxide::ChromeOxideKernel::Reset()
+{
+ iirSampleA = 0.0;
+ iirSampleB = 0.0;
+ iirSampleC = 0.0;
+ iirSampleD = 0.0;
+ flip = false;
+ secondSample = 0.0;
+ thirdSample = 0.0;
+ fourthSample = 0.0;
+ fifthSample = 0.0;
+ fpd = 17;
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// ChromeOxide::ChromeOxideKernel::Process
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+void ChromeOxide::ChromeOxideKernel::Process( const Float32 *inSourceP,
+ Float32 *inDestP,
+ UInt32 inFramesToProcess,
+ UInt32 inNumChannels,
+ bool &ioSilence )
+{
+ UInt32 nSampleFrames = inFramesToProcess;
+ const Float32 *sourceP = inSourceP;
+ Float32 *destP = inDestP;
+
+ Float64 overallscale = 1.0;
+ overallscale /= 44100.0;
+ overallscale *= GetSampleRate();
+ Float64 bassSample;
+ Float64 randy;
+ Float64 bias = GetParameter( kParam_Two )/1.31578947368421;
+ Float64 intensity = 0.9+pow(GetParameter( kParam_One ),2);
+ Float64 iirAmount = pow(1.0-(intensity/(10+(bias*4.0))),2)/overallscale;
+ //make 10 higher for less trashy sound in high settings
+ Float64 bridgerectifier;
+ Float64 trebleGainTrim = 1.0;
+ Float64 indrive = 1.0;
+ Float64 densityA = (intensity*80)+1.0;
+ Float64 noise = intensity/(1.0+bias);
+ Float64 bassGainTrim = 1.0;
+ Float64 glitch = 0.0;
+ bias *= overallscale;
+ noise *= overallscale;
+
+ if (intensity > 1.0)
+ {
+ glitch = intensity-1.0;
+ indrive = intensity*intensity;
+ bassGainTrim /= (intensity*intensity);
+ trebleGainTrim = (intensity+1.0)/2.0;
+ }
+ //everything runs off Intensity now
+
+ while (nSampleFrames-- > 0) {
+ long double inputSample = *sourceP;
+ if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37;
+
+ inputSample *= indrive;
+ bassSample = inputSample;
+
+ if (flip)
+ {
+ iirSampleA = (iirSampleA * (1 - iirAmount)) + (inputSample * iirAmount);
+ inputSample -= iirSampleA;
+ }
+ else
+ {
+ iirSampleB = (iirSampleB * (1 - iirAmount)) + (inputSample * iirAmount);
+ inputSample -= iirSampleB;
+ }
+ //highpass section
+
+
+ bassSample -= (inputSample * (fabs(inputSample) * glitch) * (fabs(inputSample) * glitch) );
+ //overdrive the bass channel
+ if (flip)
+ {
+ iirSampleC = (iirSampleC * (1 - iirAmount)) + (bassSample * iirAmount);
+ bassSample = iirSampleC;
+ }
+ else
+ {
+ iirSampleD = (iirSampleD * (1 - iirAmount)) + (bassSample * iirAmount);
+ bassSample = iirSampleD;
+ }
+ //bass filter same as high but only after the clipping
+ flip = !flip;
+
+ bridgerectifier = inputSample;
+ //insanity check
+ randy = bias+((rand()/(double)RAND_MAX)*noise);
+ if ((randy >= 0.0)&&(randy < 1.0)) bridgerectifier = (inputSample * randy)+(secondSample * (1.0-randy));
+ if ((randy >= 1.0)&&(randy < 2.0)) bridgerectifier = (secondSample * (randy-1.0))+(thirdSample * (2.0-randy));
+ if ((randy >= 2.0)&&(randy < 3.0)) bridgerectifier = (thirdSample * (randy-2.0))+(fourthSample * (3.0-randy));
+ if ((randy >= 3.0)&&(randy < 4.0)) bridgerectifier = (fourthSample * (randy-3.0))+(fifthSample * (4.0-randy));
+ fifthSample = fourthSample;
+ fourthSample = thirdSample;
+ thirdSample = secondSample;
+ secondSample = inputSample;
+ //high freq noise/flutter section
+
+ inputSample = bridgerectifier;
+ //apply overall, or just to the distorted bit? if the latter, below says 'fabs bridgerectifier'
+
+ bridgerectifier = fabs(inputSample)*densityA;
+ if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
+ //max value for sine function
+ bridgerectifier = sin(bridgerectifier);
+ if (inputSample > 0) inputSample = bridgerectifier/densityA;
+ else inputSample = -bridgerectifier/densityA;
+ //blend according to densityA control
+
+ inputSample *= trebleGainTrim;
+ bassSample *= bassGainTrim;
+ inputSample += bassSample;
+ //that simple.
+
+ //begin 32 bit floating point dither
+ int expon; frexpf((float)inputSample, &expon);
+ fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
+ inputSample += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
+ //end 32 bit floating point dither
+
+ *destP = inputSample;
+
+ sourceP += inNumChannels; destP += inNumChannels;
+ }
+}
+
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